A JSP fragment is an executable representation of a set of dynamic elements(action an EL expressions),optionally mixed with template text.When the tag file invokes the fragment,all the dynamic elements in the fragment are executed.
The action invokes the special fragment representin a custom action element body,but named fragments can also be provided as custom atcion attributes and be invoked by the tag file. Such fragments are invoked with the action.
Hereafter is a example to show
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